When the digestion and absorption of carbohydrates result in more energy-rich molecules than are immediately required by an anim
al, the excess is: a) stored as glycogen in the liver and muscles. b) hydrolyzed and converted to ADP. c) eliminated in the feces. d) oxidized and converted to ATP. e) stored as starch in the liver.
Glycogen is the stored form of glucose in animals. Digestion of carbohydrates breakdown the complex sugars into simple sugars, mainly glucose. These simpler sugars are carried to cells to serve as respiratory substrates. The excess of the simpler sugars is taken up by the cells of the liver and muscles and is stored in the form of glycogen.
Glycogen storage in liver and muscle cells serves as a source of glucose as and when required. The large cytosolic granules of glycogen consist of glycogen and the enzymes required for its synthesis and breakdown. The synthesis of glycogen from glucose is called glycogenesis.
